Medical Definition of Red blood cells. Red blood cells: The blood cells that carry oxygen. Red cells contain hemoglobin and it is the hemoglobin which permits them to transport oxygen (and carbon dioxide). Hemoglobin, aside from being a transport molecule, is a pigment. It gives the cells their red color (and their name).
Alexander Milne Calder (August 23, 1846 â June 4, 1923) was a Scottish American sculptor best known for the architectural sculpture of Philadelphia City Hall. Both his son, Alexander Stirling Calder, and grandson, Alexander Sandy Calder, became significant sculptors in the 20th century.
Conqueror and king of Macedonia, Alexander the Great was born on July 20, 356 B.C., in Pella, Macedonia. During his leadership, from 336 to 323 B.C., he united the Greek city-states and led the Corinthian League. He also became the king of Persia, Babylon and Asia, and created Macedonian colonies in the region.hile considering the conquests of Carthage and Rome, Alexander the Great died of malaria in Babylon (now Iraq), on June 13, 323 B.C. He was just 32 years old. Rhoxana gave birth to his son a few months later.